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Water-18O

Properties, data and information sources.

 

Contents

(18O)-water is an inorganic chemical compound. This is water in which the oxygen in the natural composition has been replaced by the isotope oxygen-18. It is therefore an isotopologue of conventional water or water marked with 18O.

 

Names and Identifiers

Name
Water-18O
Formula
H218O
H218O
Molar mass
20.015 (g/mol)
CAS registry number
14314-42-2
InChI Key
XLYOFNOQVPJJNP-NJFSPNSNSA-N

Other names, synonyms
[18O]-Water; [18O]-Water; Heavy-oxygen water; 18O Labeled water

 

Chemical formulas

Molecular formula and structural formula of Water-18O:

 

H218O oder H218O

Mr = 20.0152 g/mol
SMILES: [18OH2]

 

Percentage and isotopic composition:

Mass-related elemental composition and isotope proportions of the compound Water-18O - H218O - calculated based on molecular mass.

Symbol
Element E
Number x
of atoms Ex
Data of the element
and isotopes *
Percentages
of isotopes
Percentage of
Ex in formula mass
H
Hydrogen
2 Ar = 1.008 u
ΣAr = 2.016 u
3H: 3.01605 u [<< 1 %]
1H: 1.00783 u [99,99 %]
2H: 2.0141 u [0,01 %]
 
3H: trace
1H: 10.07136 %
2H: 0.00101 %
10.0724 %O
Oxygen
1ΣAr = 17.999159613 u
18O: 17.99916 u [100 %]
 
18O: 89.92763 %
89.9276 %

*) The third column lists the atomic masses or isotope masses of the elements involved and - in square brackets - the natural isotope composition.

 

More calculated data

The molar mass is M = 20.015159613 grams per mole.

The amount of substance in one kilogram of the substance is n = 49.962 mol.

The amount of substance in one gram of the substance is n = 0.05 mol.

Monoisotopic mass: 20.0148096774 Da - related to 1H218O.

 

External Sources

PubChem:ID 105142ChemSpider:ID 94856UNII of the FDA (USA):Unique Ingredient Identifier 7QV8F8BYNJEPA CompTox Chemicals Dashboard:DTXSID40933267Other CAS RN:14797-71-8 (also used, outdated or deleted registration numbers)

 

Manufacturers and Sources of Supply

The table below lists producers and suppliers of Water-18O as a commercial chemical for laboratories, research, industry and production with the corresponding contact details.

 

Literature Sources

[0] - Specialist and research articles in scientific journals via PubMed: Water-18O.

 


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Last update: 2024-10-02


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